I am not aware the WTS has ever apologised for anything - I would be grateful if anyone could correct me here with an example. And the reason is obvious - they never make mistakes. If they did, they couldn’t possibly write the following could they? (Awake Feb 8, 1972 page 4):
The Wisdom of Admitting a Mistake.
“Of course, admitting we made a mistake is the right, honest and decent thing to do. But it is more than that. It is also the course of wisdom. … Wisely we are warned: ‘He that is covering over his transgressions will not succeed [with God], but he that is confessing and leaving them will be shown mercy’ - by God and by God’s servants. Admitting to making a mistake is the course of wisdom … Failure to do so is cowardly … When we refuse to admit we have made a mistake … we are either too proud, or dishonest, or too stupid to recognize that we made a mistake …